chap 3 exam

Question 1

How does PPP interface with different network layer protocols?

Answer 1

by using separate NCPs

Question 2

Which three physical layer interfaces support PPP

Answer 2

synchronous serial
HSSI
asynchronous serial

Question 3

3 types of LCP frames used with PPP

Answer 3

link-termination frames
link-maintenance frames
link-establishment frames

Question 4

Which protocol will terminate the PPP link after the exchange of data is complete?

Answer 4

LCP

Question 5

three statements are true about PPP?

Answer 5

PPP uses LCPs to agree on format options such as authentication, compression, and error detection

• PPP can use synchronous and asynchronous circuits.
• PPP uses LCPs to establish, configure, and test the data link connection.

Question 6

A network engineer is troubleshooting the loss of MPEG video viewing quality as MPEG video files cross a PPP WAN link. What could be causing this loss of quality?

Answer 6

The compress command was used when PPP was configured on the interfaces.
–Using the compress command when configuring PPP on interfaces can reduce the system performance due to a software compression process. The reduced performance may reduce the content delivery quality, especially in the case of audio and video streaming, such as MPEG file streaming.

Question 7

Which three statements are true about PPP? (Choose three.)

Answer 7

PPP uses LCPs to establish, configure, and test the data link connection.

• PPP uses LCPs to agree on format options such as authentication, compression, and error detection.
• PPP can use synchronous and asynchronous circuits.

Question 8

what are the steps of PPP CHAP authentication process?

Answer 8

1- use LCP to negotiate the type of authentication, calculatethe id and random number, calculate the MD5 hash, send challenge id hash and username. , calculate hash besed on received info and finally compare the received hash with calculated hash.